// ============================================================================
//
// Copyright (C) 2006-2007 Dengues
//
// Google Group: http://groups.google.com/group/dengues
// QQ Group: 24885404
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public
// License as published by the Free Software Foundation; either
// version 2.1 of the License.
//
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
// Lesser General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
//
// ============================================================================
package org.dengues.designer.ui.editors;

import java.util.List;

import org.dengues.core.process.CompElement;
import org.dengues.designer.ui.process.editors.GEFComponentsEditor;
import org.eclipse.draw2d.geometry.Dimension;
import org.eclipse.draw2d.geometry.Rectangle;
import org.eclipse.gef.commands.Command;

/**
 * Qiang.Zhang.Adolf@gmail.com class global comment. Detailled comment <br/>
 * 
 * $Id: Dengues.epf 1 2006-09-29 17:06:40Z qiang.zhang $
 * 
 */
public abstract class AbstractGEFCommand extends Command {

    protected CompElement element;

    /*
     * (non-Javadoc)
     * 
     * @see org.eclipse.gef.commands.Command#undo()
     */
    @Override
    public abstract void undo();

    @Override
    public abstract void execute();

    /**
     * Qiang.Zhang.Adolf@gmail.com Comment method "initNewBounds".
     * 
     * @param newBounds
     */
    protected void initNewBounds(Rectangle newBounds) {
        if (element.getCompProcess().isGridEnabled()) {
            int tempVar = newBounds.x / GEFComponentsEditor.GRID_SIZE;
            newBounds.x = tempVar * GEFComponentsEditor.GRID_SIZE;
            tempVar = newBounds.y / GEFComponentsEditor.GRID_SIZE;
            newBounds.y = tempVar * GEFComponentsEditor.GRID_SIZE;
        }
    }

    /*
     * (non-Javadoc)
     * 
     * @see org.eclipse.gef.commands.Command#execute()
     */
    public boolean isContainsRect(Rectangle newBounds) {
        if (element != null) {
            List<? extends CompElement> elements = element.getCompProcess().getElements();
            for (CompElement e : elements) {
                if (e != element && e.getLocation() != null && e.getSize() != null && !e.getSize().equals(Dimension.SINGLETON)) {
                    Rectangle rectangle = new Rectangle(e.getLocation(), e.getSize());
                    if (rectangle.touches(newBounds)) {
                        return false;
                    }
                }
            }
        }
        return true;
    }

}
